Granby, MO Hail Storm – May 2025

Granby, MO, saw a concluded hail event on 2025-05-22 with a maximum confirmed hail size of 1 inch. Four NWS alerts covered the storm through the night.

What Happened

The first alert came at 9:58 PM CDT on 2025-05-22 with 1-inch hail tagged by radar and spotter verification. A second alert followed at 12:16 AM CDT on 2025-05-23 with the same hail size and the same radar and spotter confidence.

Two more alerts were issued later in the overnight period. One came at 12:46 AM CDT with 1-inch hail supported by dual-polarization radar. The final alert came at 1:02 AM CDT, also for 1-inch hail with dual-polarization radar confidence.

The storm remained a hail-producing system across multiple alerts and did not show a change in the confirmed peak size. The warning area repeated the same hail threat through the evening and overnight hours.

Damage Assessment

One-inch hail is enough to affect roofs, siding, soft metals, vents, and vehicles. Reports from this size range often include dented gutters, bruised shingles, and marks on exterior trim. Crews should also expect isolated window and screen damage where hail strikes were concentrated.

Granby’s multi-alert sequence points to more than one round of hail within the same event. That can leave a mixed field of impacts. Some properties may show visible damage at the roofline or on south-facing exposures while nearby structures remain only lightly marked. Check for collateral issues around downspouts, flashing, ridge caps, and painted metal surfaces.

For claims work, document the property from the street and then move to close-up inspection. Look for impact points on shingles, metal fascia, AC fins, gutters, and any accessories mounted above grade. On vehicles, note hood, roof, and horizontal panel damage before cleaning or moving the unit.

What Contractors Should Know

Plan for a broad canvass. Four alerts over roughly three hours suggest overlapping hail exposure across the warning area. Start with the neighborhoods most likely to have been under the later overnight alerts, then expand outward. Keep inspection notes tied to the date, the alert time, and the observed hail size. Separate direct hail marks from wear, storm runoff, and pre-existing defects.

Expect the usual roof complaints to be paired with exterior metal damage. Soft metals, ridge vents, and gutter systems often show the first obvious indicators at this hail size. On insurance-driven inspections, photograph every test square, every dented metal component, and every accessory that shows impact. If you are scheduling field teams, assign enough time for both roof access and ground-level documentation.

Use the storm timing to stage work in sequence. Early evening damage checks can focus on initial impact areas. Overnight alerts can widen the search when multiple passes are reported. Keep estimates clean and location-specific. Do not assume uniform impact across the full warning area.